Imported Upstream version 4.6.0.125

Former-commit-id: a2155e9bd80020e49e72e86c44da02a8ac0e57a4

mcs/class/referencesource/System.Web/Routing/UrlRoutingHandler.cs

@@ -0,0 +1,75 @@
+namespace System.Web.Routing {
+    using System;
+    using System.Diagnostics.CodeAnalysis;
+    using System.Globalization;
+    using System.Web;
+    using System.Runtime.CompilerServices;
+
+    [TypeForwardedFrom("System.Web.Routing, Version=3.5.0.0, Culture=Neutral, PublicKeyToken=31bf3856ad364e35")]
+    public abstract class UrlRoutingHandler : IHttpHandler {
+
+        private RouteCollection _routeCollection;
+
+        protected virtual bool IsReusable {
+            get {
+                return false;
+            }
+        }
+
+        [SuppressMessage("Microsoft.Usage", "CA2227:CollectionPropertiesShouldBeReadOnly",
+            Justification = "This needs to be settable for unit tests.")]
+        public RouteCollection RouteCollection {
+            get {
+                if (_routeCollection == null) {
+                    _routeCollection = RouteTable.Routes;
+                }
+                return _routeCollection;
+            }
+            set {
+                _routeCollection = value;
+            }
+        }
+
+        protected virtual void ProcessRequest(HttpContext httpContext) {
+            ProcessRequest(new HttpContextWrapper(httpContext));
+        }
+
+        protected virtual void ProcessRequest(HttpContextBase httpContext) {
+            RouteData routeData = RouteCollection.GetRouteData(httpContext);
+            if (routeData == null) {
+                throw new HttpException(404, SR.GetString(SR.UrlRoutingHandler_NoRouteMatches));
+            }
+
+            IRouteHandler routeHandler = routeData.RouteHandler;
+            if (routeHandler == null) {
+                throw new InvalidOperationException(SR.GetString(SR.UrlRoutingModule_NoRouteHandler));
+            }
+
+            RequestContext requestContext = new RequestContext(httpContext, routeData);
+            IHttpHandler httpHandler = routeHandler.GetHttpHandler(requestContext);
+            if (httpHandler == null) {
+                throw new InvalidOperationException(
+                    String.Format(
+                        CultureInfo.CurrentUICulture,
+                        SR.GetString(SR.UrlRoutingModule_NoHttpHandler),
+                        routeHandler.GetType()));
+            }
+
+            VerifyAndProcessRequest(httpHandler, httpContext);
+        }
+
+        protected abstract void VerifyAndProcessRequest(IHttpHandler httpHandler, HttpContextBase httpContext);
+
+        #region IHttpHandler Members
+        bool IHttpHandler.IsReusable {
+            get {
+                return IsReusable;
+            }
+        }
+
+        void IHttpHandler.ProcessRequest(HttpContext context) {
+            ProcessRequest(context);
+        }
+        #endregion
+    }
+}